The International Photography Hall of Fame and Museum (IPHF) presents a special exhibition, 40th Anniversary: Nanjing-St. Louis Sister City: Retrospective, in celebration of the unique partnership between St. Louis and Nanjing, China. The exhibition features more than 150 images of Nanjing, a city both rich in history and vibrantly modern.

In 1979, St. Louis was the first U.S. city to establish formal ties with a sister city in China, This partnership has grown throughout the intervening years with continued exchanges of culture, commerce, and goodwill.